Turn Off or Get Rid of Grab app
Several people have asked about not opening photos, etc., with Grab. The answers have all been change "Open With." However, that change does not continue -- Grab will come up again, intermittently, and in opening a image file, changes all the other photos with that extension.
How can I disable, remove, permanently block, erase -- just get rid of Grab?
Mac mini, macOS High Sierra (10.13)